The Mystery of the Waterfree Urinal

You know how you have a question about something and you tell yourself that you'll look it up when you get home, but end up forgetting to? Well, for once I remembered! I have seen a few places now that use water-free urinals. There is no flushing, and yet it is supposed to still be hygienic. So I finally remembered to google it to prove to myself that this wasn't just a glorified hole in the ground. After reading it, I'm a little amazed that this technology is only starting to catch on. I wonder if it's because so many people in developed countries have a hard time understanding how it's possible to have a water shortage, just like there are many who are skeptical about global warming.